| 一种大量程双弹簧式光纤光栅位错计 |
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| 引用本文： | 孙丽,徐自强,张春巍,李闯. 一种大量程双弹簧式光纤光栅位错计[J]. 光电子．激光, 2018, 29(4): 354-362 |
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| 作者姓名： | 孙丽 徐自强 张春巍 李闯 |
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| 作者单位： | 沈阳建筑大学 土木工程学院 辽宁 110168,沈阳建筑大学 土木工程学院 辽宁 110168,青岛理工大学 土木工程学院,山东 266033,沈阳建筑大学 土木工程学院 辽宁 110168 |
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| 基金项目： | 国家自然科学基金(51578347)、辽宁省高等学校创新团队项目(LT2015023)、辽宁省自然科学基金(2015020578)、辽宁省“百千万人才工程”(2014921045)和山东省泰山学者优势特色学科人才团队支持计划资助项目 (1.沈阳建筑大学 土木工程学院 辽宁 110168; 2.青岛理工大学 土木工程学院,山东 266033) |
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| 摘 要： | 设计了一种大量程双弹簧式光纤光栅位错计。选 用弹簧作为位移-力转化元件,使光纤布拉格光栅 (fiber Bragg grating,简称FBG)所在基体发生轴向应变进而得到中心波长变化量。理论分 析了FBG位错 计机械结构与基体之间的位移传递关系,给出了位错计的理论灵敏度系数公式。以位移量为 变化参数,对 FBG位错计进行了标定试验并根据数据进行传感器静态特性分析。结果表明,位错计的双向 线性度分别为 2.445%和2.386%；迟滞性分别为 3.385%和1.237%；灵敏度系数分别为34.93pm/cm和31.20pm/cm。该 FBG位错计结构简单、量程大、精度高、抗电磁干扰且可以实现温度自补偿。可应用于恶劣 以及复杂的地下工程结构长期的相对沉降远程监测。
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| 关 键 词： | 光纤光学 光纤光栅 位错计 结构健康监测 标定试验 |
| 收稿时间： | 2017-08-28 |
A fiber Bragg grating dislocation meter with a wide range based on dual spring |
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| SUN Li,XU Zi-qiang,ZHANG Chun-wei and LI Chuang. A fiber Bragg grating dislocation meter with a wide range based on dual spring[J]. Journal of Optoelectronics·laser, 2018, 29(4): 354-362 |
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| Authors: | SUN Li XU Zi-qiang ZHANG Chun-wei LI Chuang |
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| Affiliation: | School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China,School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China,School of Civil Engineering,Qingdao University of Technology,Qingdao 266033, China and School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China |
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| Abstract: | A fiber Bragg grating (FBG) dislocation meter with wide range based on dual spring is designed. The spring is used as the displacement-force conversion component,the axia l strain of the strain sensing chip adhered to FBG is obtained,and then the F BG central wavelength change is obtained. The displacement transfer relation between mechanical structure of FBG dislocation meter and the strain se nsing chip is theoretically analyzed, in addition the theoretical sensitivity coefficient formula of the sensor is giv en.The sensor is calibrated by the uniform change of displacement,and the static characteristi cs of the sensor are analyzed according to the data.The results show that the degreees of lineari ty of the sensor are 2.445% and 2.386%,the hystereses are 3.385% and 1.237%,and the sensitivity coefficients are 34.93pm/cm and 31.20pm/cm,respectively.The FBG d islocation meter has the advantages of simple structure,large range,high measurement accuracy, anti electromagnetic interference and self compensation of temperature.It can be ap plied to remote monitoring of long-term relative subsidence of complex undergro und engineering structures. |
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